Screen insect control



Feb. 18, 1930. A. A. LUNDY SCREEN INSECT CONTROL.

Filed Sept. 6, 1928 2 Sheets-Sheet l Feb. 18, 1930. LUNDY 1,747,254

SCREEN INSECT CONTROL Filed Sept. 6, 1 928 2 Sheets-Sheet 2 l m V "22 I L23 3B 3 B L I j 11\ IZ IFIGEA.

Patented Feb. 18, 1930 UNITED STATES LV A. MI F nlwelams mamas scnnnu msnor oon'rnop Application filed September 6, 1928. Serial AVG-304348.

This invention relates to screen structures and more particularly to window and door screens, and one feature of the invention is the provision of passage ways or slots in certain portions of the screen structures, through which insects may escape from the interior of the room.

A further feature of the invention is the provision of means for conveniently attaching the screening material to the window or door frame.

A further feature of the invention is in so constructing the passage ways that the walls thereof are more or less open at their lower ends and restricted at their outer ends, and

in curved contour.

Other objects and advantages will be hereinafter more fully set forth and pointed out in the accompanying specification.

In the accompanying drawings which are made a part of this application,

Figure 1 is a fragmentary detail elevation of a window screen.

Figure 2 is a transverse section as seen on lines 2-2, Fig. 1, and 2A2A, 2B2B, Fig. 4.

Figure 3, is a sectional view as seen on lines 33, Fig. 1, and 3A3A, 3B-3B, Fig. 4.

Figure 4 is an elevation, with parts broken out, of a screen door structure.

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, the numeral 1 indicates the main frame of the window screen 2, the inner edge walls of which are provided with channels 3 for the reception of the wire holding frame 4.

Between a bar of the frame 1 and screen frame 2, preferably the top bar, are formed passageways 5, the wall of the passageway in the frame 1 being concave, while the wall of the passageway formed by the bar of the screen frame 2 is convex, thereby forming an outwardly curved passageway. The inner end of the passageway is preferably wider than the outer end thereof, thereby giving free access to the inner end of the passageway, so that an insect may readily enter the passageway, as it follows its natural tendency to crawl upwardly on the screen, while by restricting the outer end of the passageway, insects will be retarded from entering therethrough.

The inner mouth of the passageway is substantially flush with the inner face of the screen, so that an insect crawling upwardly on the screen will readily enter the passageway, the screen wire 6 being spread over and preferably secured to the convex face 7 formed on the inner face of the frame 4.

The passageways 5 are preferably provided with a rib 8, which forms a rest for the frame 4 and divides the passageways into sections, as well as forming a brace for the bar of the frame 4.

In Fig.4, an ordinary screen door structure is shown, and in this instance, passageways 9 and 10 are formed respectively at the cross bar 11 of the door and the top bar thereof, the passageways being constructed the same as the passageways 5. The frame structures 4 of the screen and door proper are preferably provided with beads 12, which not only strengthen said frames, but add a finished appearance thereto.

In constructing the screen member, the screen wire is first attached to the frame 4 in any suitable manner and this frame then set in the channel formed in the frame proper 1 and secured therein in any suitable manner, with the selvage edges of the wire resting in the channel so as to exclude the same from view.

The lower outlet edges 13 of the passageways 5, form a somewhat obtuse angle so that insects crawling upward on the exterior screen or door surface will find it difficult to crawl over such a sharp edge, and will be more inclined to crawl across said outlet instead of entering same.

The main frames 1 have rounded corners 14, at the entrance of the passage-ways 5, by which arrangement an insect crawling up on the interior screen surface will have difficulty in spanning said entrance, and will thus find it more convenient to enter than crawl over same.

WVhat I claim is:

In a screen structure, a frame having a channel in one edge thereof, a screen carrying frame adapted to be secured in said channel, one portion of one bar of the frame proper having a concave portion and the corresponding bar of the screen carrying frame having a 5 convex portion, said concave and convex portions forming a curved passageway, said curvature being such that the rays of light entering at one end of the passageway will not penetrate to the opposite end of the passage- 10 way, the concave and convex walls of said passageway being flared away from each other for gradually increasing the cross area of said passageway from its outer to its inner end.

In testimony whereof, I have hereunto set 15 iylgand on this the 22nd day of August, 1928 ALVIN A. LUNDY. 

